Belt Retractor Sensor
Belt retractor sensors are available for XC60 on all markets. For S80 (07-)/S80L/V70 (08-)/XC70 (08-) there are belt retractor sensors only for USA/CDN.
The belt retractor sensor monitors the status of belt extension.
The belt retractor sensor sends information on the status of belt extension to the control module in real time. The control module then analyzes the obtained values and uses the results so that the belt force limiter can optimize belt force for the person occupying the seat.
There are two belt retractor sensors in the vehicle - one on the driver's side belt retractor and one on the front passenger side belt retractor.
Data is transmitted on the same cable used for power supply. There is a signal/power supply cable for each belt retractor sensor as well as a ground cable.
The adaptive belt force limiter, belt retractor, belt retractor sensor and belt tensioner are mounted in a unit. If there is a fault in any of these components, the entire unit must be replaced.